I could probably reverse engineer most of the set from image, but are the official instructions available anywhere?
As TheBrickBlogger said, you need to wait:
Even contacted their customer support and the reply was:
I don't think those are every available publicly
Not unless you are an employee
And after insisting repeatedly, answer from seniors was:
So they confirmed they would not be available. Sorry!
Update: rebrickable have full detail of all individual pieces (281) and video demo too.
BZPower has done a live stream build of the set. It's not exactly the instructions, but you can follow along with the video to learn how it's built.
I found this video showing the building instruction booklet page by page